Quick view Hornady Hrndy 300blk 190gr Sub-x 20/200 $21.85 Hornady(R) 300 Blackout Subsonic Ammunition is designed for accuracy and performance below the speed of sound. The new 190 gr Sub-X(R) (Subsonic - eXpanding) bullet features a lead core. Long grooves in its gilding metal jacket combine with the bullet's... Compare Add to Cart